Geoege hay



(No Model.)

' G. HAY.

'GHALK SHARPENER.

No. 517,922. Patented Apr. 10, 1894.

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TH! NATIONA umougAr-u MING? TATES A GEORGE HAY, or PICTOU, CANADA.

.CHALK-SHARPENER.

SPECIFICATION forming part of Letterslatent No. 517,922 dated April 10,1894.

Application filed April 21, 1893.

To all whom it may concern:

Be it known that I, GEORGE HAY, of Pictou, in the Province of NovaScotia and Dominion of Canada, have invented a new and usefulImprovement in Chalk-Sharpeners, of which the following is a full,clear, and exact description.

- tacle for service as a paper weight.

, To these ends, my invention consists in the construction of parts, asis hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming a part ofthis specification,

inwhichsimilar letters of reference indicate corresponding parts in allthe figures.

Figure l is a plan view of the device. Fig. 2 is a side view, in sectionon the line 22 in Fig. 1. Fig. 3 is a side View of parts, in section onthe line 3-3 in Fig. 1. Fig. 4 is a detached top view of a detail ofconstruction which is a feature of the invention. 'Fig. 5 is a side viewin section, of the part shown in Fig. 4, on the line 55 in said figure.Fig. 6 is a transverse sectional View of the chalk cutter on the line7-7 in Fig. 3, showing the manner of attaching a pliable wiper thereto,and which is a part of the invention. Fig. 7 is a detached and partlysectional side view of the cutter device and wiper attached thereto, onthe line 7-7 in Fig. 3. Fig. 8'is a perspective View of a chalk tabletwhich has been sharpened on the improved implement; and Fig. 9 is a sideview in part, of the device, showing an attachment to its base.

The base piece A, of the improved chalk cutting device, is made hollowand preferably cylindrical in form, from sheet metal, having its lowerend sealed.

On the bottom wall of the receptacle or base-piece A, a disk B of leador other suitable heavy material is located and secured, thus adaptingthe part-A, to serve as a base for the chalk cutter, a receptacle forcuttings,.

cutting device.

Serial No. 471,319- (No model.)

and a proper weight if it is desired to utilize the device for thelatter named purpose. A neatly fitting lid 0, is provided for the basepiece A, and on its'flat top a spherical shell 0', is centrally formedor secured, this part being provided to afford support for the chalk Acentral transverse slot at, of a proper width and depth is produced inthe shell 0', and within the part 0, below the slot 2. cutting mechanismof a novel, simple form is aflfixed.

The chalk cutter mentioned, consists of two similar V-shaped cutterbladesb, are bent from a single-strip of sheet metal that is capableofreceiving cutting edges. Said cutter blades are integral below thepoints 0, where they oppositely and equally diverge,

these points being the vertices of the angles pairs from the points a,are bevel sharpened to provide V-shaped cutters that are separated acorrect distance for effectiveservice. Each cutter blade I), isfurnished with outwardly extending flanges b, which are bent to conformto the inner surface of the spherical shell 0, whereon they are securedat such points as will locate the vertices c, of the cutter blades 1),at the transverse centerof the slot at.

The wiper e, consists of a strip of soft undressed leather, or any othersuitable material, which is proportioned in width and length to suit thedimensions of the cutting device on which it is affixed. There areopposite notched holes b formed between the two flanges b, of each blade1?, as shown in Fig. 4:, these apertures being designed to receive thewiper strip (2, and at the junction of v the blades b, a hole 6 isformed of small di ameter, asindicat-ed in the same figure. I

To place the strip 6, in position on the cutter device, the ends of saidstrip are passed from the inner sides of the blades 1), outwardly andthrough the holes W, a sufficient portion of the material being leftbetween the blades to extend to the hole b in a doubled condition. Astaple e, is inserted through the bight of the flexible strip e, andthence through the hole 19 its limbs projecting from the lower end ofthe integral portion of the divergent blades b. The end portions of thewiper strip 6, are now drawn taut and near their terminals are lapfolded, the staple e, being made to penetrate said folded ends, and thenthe limbs of the staples are bent to press on the portions of the wiperstrip they have penetrated, so as to secure the latter neatly and firmlyin place on the cutter device.

In Fig. 9, there is an attachment for thebase piece A shown, consistingof the pliable flaps g, that are secured on the inner surface of theslot a, at opposite points, and near the terminals of the slot, theseflaps serving to prevent dust escaping from the slot on either side ofthe same when the device is in use.

When the lid 0 is placed upon the base piece A, a slab of steatite suchas D, in Fig. 8, may have a beveled edge quickly formed on it, by firstinserting it in the slot at, and then reciprocating the slab while it ispressed gently upon the cutter blades b, the dust and cuttings beingremoved by the wiper strip e, that also prevents too free a cuttingaction that would produce a rough edge on the chalk tablet. After anedge has been produced as above described, on a piece of the soapstonetechnichally known as tailors chalk, and has become worn down in use,said edge can be renewed quickly by a few passes of the tablet throughthe cutter. device. At any time it is necessary, the cutting edges ofthe blades b may be sharpened by using a fine file on them, after thelid 0 has been removed from the base-piece A. The latter serves in useas a receptacle for the dust and cuttings removed from the tablet ofsteatite when an edge is produced on it.

The weighty bottom wall B of the base piece, is of advantage in usingtheimplement, as it renders the chalk cutters stable, and en ables theoperator to use it without having to hold it in place, when the chalkneeds to be redressed on the edges slightly, to render it serviceable.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent 1. In a chalk sharpener the cutter formed of aV-shape body having its end edges 0 0' sharpened; each blade 12 of thecutter being angular in cross section and the attaching flanges b at theupper ends of the blades b, substantially as set forth.

2. In a chalk sharpener the cutter formed of a V-shape body providedwith opening I) and having its end edges 0' c sharpened, each blade b ofthe cutter being angular in cross section and provided at its upperendwith flanges b and slots 5 substantially as set forth.

3. In a chalk sharpener, the combination with a V- shaped cutter bodyhaving two similar blades each angular in cross section and providedwith an opening at its upper end, the body being provided with anopening at the juncture of the said blades, of a wiper doubled uponitself and having its ends passed through the openings in the blades,and a staple secured in the doubled portion of the wiper, passed outthrough the opening in the body of the cutter and engaging the ends ofthe wiper, substantially as described.

4. The combination with the hollow slotted support and the V-shapecutter thereon provided with a wiper, of the dust guards g g,substantially as set forth.

5. The combination with a hollow base, a lid, a hollow slottedprojection on the lid, and a pair of cutter blades below the slot, of awiper device on the cutter device between its blades, substantially asdescribed.

6. The combination with a hollow base, a lid, a hollow slottedprojection on thelid, and a pair of V-shaped depending cutter bladessharp on edges that diverge inpairs at like angles, of a pliable wiperstrip secured on the cutter blades between the pairs of V-shaped sharpedges, substantially as described.

'7. The combination with a hollow base, a weighty bottom thereon, aremovable lid, a slotted spherical projection central on the lid, and awiper on the projection at its slot, of a pair of cutter blades belowthe slot in the lid, and a wiper device on the cutter blades betweentheir edges, substantially as described.

GEORGE I-IAY.

WVitnesses:

E. M. MAoDoNALD, FRANK P. CARROLL.

